/Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponents/Public/Selection/MeshTopologySelector.h
Provide a function that will return an AABBTree for the Mesh. See class comment for why this is necessary.
void SetSpatialSource ( [TFunction](API\Runtime\Core\GenericPlatform\TFunction)< FDynamicMeshAABBTree3 *(void)> GetSpatialFunc )